private WifiManager wifiManager;// 声明管理对象OpenWifi
private WifiInfo wifiInfo;// Wifi信息
private List<ScanResult> scanResultList; // 扫描出来的网络连接列表
private List<WifiConfiguration> wifiConfigList;// 网络配置列表
private WifiLock wifiLock;// Wifi锁

package com.wifitest;import java.util.List;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiManager.WifiLock;public class WifiManageClass
{ 
private WifiManager wifiManager;// 声明管理对象 
private WifiInfo wifiInfo;// Wifi信息 
private List<ScanResult> scanResultList; // 扫描出来的网络连接列表 
private List<WifiConfiguration> wifiConfigList;// 网络配置列表 
private WifiLock wifiLock;// Wifi锁 
public WifiManageClass(Context context)
{ 
this.wifiManager = (WifiManager) context 
.getSystemService(Context.WIFI_SERVICE);// 获取Wifi服务 
// 得到Wifi信息 
this.wifiInfo = wifiManager.getConnectionInfo();// 得到连接信息 
} 
public boolean getWifiStatus() 
{ 
return wifiManager.isWifiEnabled(); 
} // 打开/关闭 wifi 
public boolean openWifi() 
{ if (!wifiManager.isWifiEnabled()) 
{ 
return wifiManager.setWifiEnabled(true); 
} else { 
return false; 
} 
} 
public boolean closeWifi()
{ 
if (!wifiManager.isWifiEnabled())
{ 
return true; 
} 
else 
{ 
return wifiManager.setWifiEnabled(false); 
} 
} 
// 锁定/解锁wifi 
// 其实锁定WiFI就是判断wifi是否建立成功，在这里使用的是held，握手的意思acquire 得到！ 
public void lockWifi() 
{ 
wifiLock.acquire(); 
} 
public void unLockWifi()
{ 
if (!wifiLock.isHeld()) { 
wifiLock.release(); // 释放资源 
} 
} 
// 我本来是写在构造函数中了，但是考虑到不是每次都会使用Wifi锁，所以干脆自己建立一个方法！需要时调用，建立就OK 
public void createWifiLock()
{ 
wifiLock = wifiManager.createWifiLock("flyfly"); // 创建一个锁的标志 
} // 扫描网络 
public void startScan()
{ 
wifiManager.startScan(); 
scanResultList = wifiManager.getScanResults(); // 扫描返回结果列表 
wifiConfigList = wifiManager.getConfiguredNetworks(); // 扫描配置列表 
} 
public List<ScanResult> getWifiList()
{ 
return scanResultList; 
} 
public List<WifiConfiguration> getWifiConfigList()
{ 
return wifiConfigList; 
} 
// 获取扫描列表 
public StringBuilder lookUpscan() { 
StringBuilder scanBuilder = new StringBuilder(); 
for (int i = 0; i < scanResultList.size(); i++) 
{ 
scanBuilder.append("编号：" + (i + 1)); 
scanBuilder.append(scanResultList.get(i).toString()); 
//所有信息 
scanBuilder.append("\n"); 
} 
return scanBuilder; 
} //获取指定信号的强度 
public int getLevel(int NetId) 
{ 
return scanResultList.get(NetId).level; 
} // 获取本机Mac地址 
public String getMac() { 
return (wifiInfo == null) ? "" : wifiInfo.getMacAddress(); 
} 
public String getBSSID()
{ 
return (wifiInfo == null) ? null : wifiInfo.getBSSID(); 
} 
public String getSSID() 
{ 
return (wifiInfo == null) ? null : wifiInfo.getSSID(); 
} 
// 返回当前连接的网络的ID 
public int getCurrentNetId() 
{ 
return (wifiInfo == null) ? null : wifiInfo.getNetworkId(); 
} // 返回所有信息 
public String getwifiInfo() 
{ 
return (wifiInfo == null) ? null : wifiInfo.toString(); 
} // 获取IP地址 
public int getIP() { 
return (wifiInfo == null) ? null : wifiInfo.getIpAddress(); 
} // 添加一个连接 
public boolean addNetWordLink(WifiConfiguration config) { 
int NetId = wifiManager.addNetwork(config); 
return wifiManager.enableNetwork(NetId, true); 
} // 禁用一个链接 public boolean disableNetWordLick(int NetId) { 
wifiManager.disableNetwork(NetId); 
return wifiManager.disconnect(); 
} // 移除一个链接 
public boolean removeNetworkLink(int NetId)
{ 
return wifiManager.removeNetwork(NetId); 
} //不显示SSID public void hiddenSSID(int NetId) 
{ 
wifiConfigList.get(NetId).hiddenSSID=true; 
} //显示SSID public void displaySSID(int NetId) 
{ 
wifiConfigList.get(NetId).hiddenSSID=false; 
} 
}

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission><uses-permission android:name="adnroid.permission.ACCESS_CHECKIN_PROPERTTES"></uses-permission><uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission><uses-permission android:name="android.permission.INTERNET"></uses-permission><uses-permission android:name="adnroid.permission.CHANGE_WIFI_STATE"></uses-permission><uses-permission android:name="android.permission.MODIFY_PHONE_STATE"></uses-permission>